1 /******************************************************************************
2 * *
3 * Copyright (C) 2023 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 *****************************************************************************
18 * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
19 */
20
21 #include <string.h>
22 #include "ixheaac_type_def.h"
23 #include "ixheaac_constants.h"
24 #include "ixheaace_aac_constants.h"
25 #include "ixheaace_psy_utils.h"
26 #include "ixheaac_basic_ops32.h"
27 #include "ixheaac_basic_ops16.h"
28 #include "ixheaac_basic_ops40.h"
29 #include "ixheaac_basic_ops.h"
30
ia_enhaacplus_enc_init_pre_echo_control(FLOAT32 * ptr_pb_threshold_nm1,WORD32 num_pb,FLOAT32 * ptr_pb_threshold_quiet)31 VOID ia_enhaacplus_enc_init_pre_echo_control(FLOAT32 *ptr_pb_threshold_nm1, WORD32 num_pb,
32 FLOAT32 *ptr_pb_threshold_quiet) {
33 memcpy(ptr_pb_threshold_nm1, ptr_pb_threshold_quiet, num_pb * sizeof(*ptr_pb_threshold_nm1));
34 }
35
ia_enhaacplus_enc_pre_echo_control(FLOAT32 * ptr_threshold_nm1,WORD32 num_sfb,FLOAT32 min_rem_thr_factor,FLOAT32 * ptr_threshold)36 VOID ia_enhaacplus_enc_pre_echo_control(FLOAT32 *ptr_threshold_nm1, WORD32 num_sfb,
37 FLOAT32 min_rem_thr_factor, FLOAT32 *ptr_threshold) {
38 WORD32 i;
39 FLOAT32 tmp_threshold1, tmp_threshold2;
40 FLOAT32 *ptr_tmp_threshold = &ptr_threshold[0];
41 FLOAT32 *ptr_tmp_threshold_nm1 = &ptr_threshold_nm1[0];
42
43 for (i = num_sfb - 1; i >= 0; i--) {
44 FLOAT32 tmp_var;
45
46 tmp_var = *ptr_tmp_threshold;
47
48 tmp_threshold1 = *ptr_tmp_threshold_nm1 * 2.0f;
49
50 tmp_threshold2 = (min_rem_thr_factor * tmp_var);
51
52 /* copy thresholds to internal memory */
53 *ptr_tmp_threshold_nm1++ = tmp_var;
54
55 tmp_var = MIN(tmp_var, tmp_threshold1);
56
57 tmp_var = MAX(tmp_var, tmp_threshold2);
58 *ptr_tmp_threshold++ = tmp_var;
59 }
60 }
61